and Control (AVC) classifies applications using deep packet inspection
techniques with the Network-Based Application Recognition
(NBAR) engine, and provides application-level visibility
and control into Wi-Fi networks. After the applications are recognized, the AVC
feature enables you to either drop or mark the data traffic.
Using AVC, we can
detect more than 1000 applications. AVC enables you to perform real-time
analysis and create policies to reduce network congestion, costly network link
usage, and infrastructure upgrades.
You can view list
of 30 applications in Top Applications in Monitor Summary section of the UI.
AVC is supported on the
following controller platforms: Cisco 2500 Series Wireless LAN Controllers,
Cisco 5500 Series Wireless LAN Controllers, Cisco Flex 7500 Series Wireless LAN
Controllers in central switching mode, Cisco 8500 Series Wireless LAN
Controllers, and Cisco Wireless Services Module 2 (WiSM2).
AVC DSCP marks only
the DSCP of the original packet in the controller in both directions (upstream
and downstream). It does not affect the outer CAPWAP DCSP. AVC DSCP is
applicable only when the application is classified. For example, based on the
AVC profile configuration, if an application is classified as ftp or http, the
corresponding DSCP marking is applied irrespective of the WLAN QoS. For
downstream, the DSCP value of outer CAPWAP header and inner packet’s DSCP are
taken from AVC DSCP. WLAN QoS is only applicable for all traffic from WLC to AP
through CAPWAP. It does not change the DSCP of the original packet.
Visibility and Control Protocol Packs
Protocol packs are a
means to distribute protocol updates outside the controller software release
trains, and can be loaded on the controller without replacing the controller
Visibility and Control Protocol Pack (AVC Protocol Pack) is a single compressed
file that contains multiple Protocol Description Language (PDL) files and a
manifest file. A set of required protocols can be loaded, which helps AVC to
recognize additional protocols for classification on your network. The manifest
file gives information about the protocol pack, such as the protocol pack name,
version, and some information about the available PDLs in the protocol pack.
The AVC Protocol
Packs are released to specific AVC engine versions. You can load a protocol
pack if the engine version on the controller platform is the same or higher
than the version required by the protocol pack.